JPH10312775A - Light bulb color fluorescent lamp - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In consideration of the inferior appearance of a red-based object color of a conventional three-wavelength-range light-emitting bulb color fluorescent lamp, the appearance of a red-based color is equal to or greater than that of an incandescent lamp. In addition, it is possible to realize a three-color light-emitting bulb color fluorescent lamp, which is better than the incandescent light bulb and has the same appearance of the green object color as or better than the incandescent light bulb. thing. SOLUTION: The value of a conspicuous index M of a lamp is 121 or more and 145 or more.
And the correlated color temperature of the light color of the lamp is 2700K or more and 315
A light bulb fluorescent lamp having a chromaticity point of 0K or less and a chromaticity point of a light color in a chromaticity range of -0.005 or more and +0.005 or less on a CIE 1960 uv chromaticity diagram from a blackbody locus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp having a light color in a light bulb color region.

[0002]

2. Description of the Related Art At present, a three-wavelength band fluorescent lamp having high efficiency and high color rendering is widely used as a general illumination lamp. This three-wavelength band fluorescent lamp has a blue color of about 450 nm, a green color of about 540 nm, which the human eye can easily perceive.
This is a fluorescent lamp in which light is concentrated in three red wavelength regions of about 610 nm to enhance color rendering without deteriorating brightness. This 3
By making the energy of different wavelength ranges different,
A three-wavelength band fluorescent lamp of various light colors is produced.

[0003] By the way, from several years ago, a three-wavelength band light-emitting fluorescent lamp (hereinafter referred to as a three-wavelength light-emitting lamp color fluorescent lamp) of light bulb color, which is a light color that creates a warm atmosphere with ample space, has been regarded as important. Being used for indoor lighting. This light bulb color is a light color similar to the light color of an incandescent light bulb, and furthermore, since the three-wavelength band light emitting bulb color fluorescent lamp has higher efficiency than an incandescent light bulb, it is used as an alternative to an incandescent light bulb. Is also expected.

[0004]

However, although the light colors are similar, the three-wavelength-band light-emitting fluorescent lamp is inferior to the incandescent lamp in light color as described below. There is a side.

In other words, incandescent lamps have been widely used around the world since Edison invented them. The color characteristics of this incandescent light bulb are such that, in addition to being a light color that creates a spacious and warm atmosphere, an object color looks beautiful and creates a luxurious atmosphere.

[0006] However, the three-wavelength-range light-emitting bulb-type fluorescent lamp has a particularly poor appearance of a red-based object color as compared with an incandescent lamp. Therefore, such a conventional three-wavelength-range light-emitting bulb color fluorescent lamp has a problem that it is clearly inferior to a high-grade atmosphere obtained from the appearance of colors by an incandescent bulb. Incidentally, the appearance of the green object color is equal to or higher than that of an incandescent light bulb.

The present invention considers such a poor appearance of a red-based object color of a conventional three-wavelength-range light-emitting bulb-type fluorescent lamp, and the red-based color appearance is equivalent to that of an incandescent lamp. Provide a fluorescent lamp with a three-wavelength band emission type that is even better and has a green object color appearance equal to or better than that of incandescent bulbs, and at the same time is more efficient than incandescent bulbs. It is intended to do so.

[0008]

[Means for Solving the Problems]

As for the appearance of colors due to illumination light, there is currently a "method of evaluating the fidelity of appearance of colors" as a method for quantitatively evaluating the color rendering of a light source. This is a method to quantitatively evaluate how faithfully the target lamp reproduces the color compared to the reference light.
SZ 8726 `` Method for evaluating color rendering of light source ''
It is represented by the numerical value of the average color rendering index Ra. At present, fluorescent lamps are also being developed with the aim of improving the average color rendering index Ra and improving the brightness efficiency.

[0010] On the other hand, in addition to the evaluation of the fidelity of the appearance of color, research on a "method of evaluating the preference of the appearance of color" has recently been conducted. This method is a method for quantitatively evaluating whether the target lamp has a color shift when compared with the reference light, and whether the color shift is a shift in a preferable direction or a shift in an unfavorable direction. . It can be seen from this evaluation method that even if there is a shift in the above-described fidelity, if the shift is in a preferable direction, the appearance of the color will give a better result for a person.

Regarding the evaluation method of the preference of the color appearance, attention is paid to the conspicuousness (conspicuous effect) based on the color rendering properties of the light source, and the degree of vividness of the object color by the conspicuous index developed from the concept of the conspicuousness. "Color Research and Application Vol. 19, No. 3
No. ”Hashimoto et al. (Visual Clarity and Feeling of Contras
t, Color Research and Application, 19, 3, June, (19
94)), Hashimoto et al .: Method for evaluating color rendering of light source based on conspicuousness, Journal of the Illuminating Engineering Institute of Japan, 79, 11, (1995), JP-A-6-180248.
This is known from Japanese Patent Application Laid-Open No. Hei 4-333919.

[0012] Therefore, in order to develop a light bulb color fluorescent lamp that produces a beautiful and luxurious atmosphere obtained from the appearance of the color of the object color of the incandescent light bulb, foods that are important objects with respect to the conspicuous effect of the light source are required. If the color appearance of red and green leaves can be made equal to or better than that of an incandescent light bulb by using the evaluation method of the color appearance preference, a high-class atmosphere is created. Therefore, it can be seen that only important object colors can be efficiently and beautifully displayed, and a high-class atmosphere can be produced.

In other words, the appearance of the color with respect to the red of the food and the green of the leaves, which are important objects with respect to the conspicuous effect of the light source, is determined by using the evaluation method of the color appearance.
The most important problem is to determine a color characteristic range that is substantially equal to or more than the appearance of an incandescent light bulb.

The present invention provides a fluorescent lamp having a high lamp efficiency based on the conspicuous index M and having color characteristics substantially equivalent to incandescent lamps.

According to the first aspect of the present invention, the value of the conspicuous index M of the lamp is 121 or more and 145 or less, the correlated color temperature of the light color of the lamp is 2700 K or more and 3150 K or less, and the chromaticity point of the light color is
CIE1960 uv The chromaticity deviation from the blackbody locus on the chromaticity diagram is -0.00
This is a light bulb color fluorescent lamp that exists in a chromaticity range of 5 or more and +0.005 or less.

According to a second aspect of the present invention, the value of the conspicuous index M of the lamp is 123 or more and 145 or less, the correlated color temperature of the light color of the lamp is 2700 K or more and 2900 K or less, and the chromaticity point of the light color is
CIE1960 uv The chromaticity deviation from the blackbody locus on the chromaticity diagram is -0.00
This is a light bulb color fluorescent lamp that exists in a chromaticity range of 5 or more and +0.005 or less.

According to a third aspect of the present invention, the correlated color temperature of the light color of the lamp is not less than 2700 K and not more than 3150 K, and the chromaticity point of the light color is the chromaticity from the blackbody locus on the CIE 1960 uv chromaticity diagram. Deviation is-
A light bulb color fluorescent lamp which is present in a chromaticity range of 0.005 or more and +0.005 or less and has a lamp prominence index M satisfying M ≧ 75000 / T + 97.0 and M ≦ 75000 / T + 118.5.

According to a fourth aspect of the present invention, the peak wavelength is 400 nm.
460 nm or less blue phosphor, peak wavelength 500 nm or more and 550 nm or less green phosphor, peak wavelength 600 nm or more
620nm or less red phosphor, and the peak wavelength is 625
4. The light bulb color fluorescent lamp according to claim 1, comprising a deep red phosphor having a wavelength of not less than nm and not more than 670 nm.

According to a fifth aspect of the present invention, the blue phosphor is a divalent europium-activated blue phosphor having a peak wavelength of 400 nm to 460 nm, and the green phosphor has a peak wavelength.
Terbium-activated green phosphor having a wavelength of 500 nm or more and 550 nm or less,
Or a terbium / cerium activated green phosphor, the red phosphor is a trivalent europium activated red phosphor having a peak wavelength of 600 nm or more and 620 nm or less, and the deep red phosphor has a peak wavelength of 625 nm or more and 670 nm or less. The light bulb color fluorescent lamp according to claim 4, which is a manganese-activated deep red phosphor.

According to a sixth aspect of the present invention, the blue phosphor is 0% in weight% of the phosphor in the bulb color fluorescent lamp.
6% or less, the green phosphor is 20% or more and 25% or less, the red phosphor is 30% or more and 55% or less,
The light bulb color fluorescent lamp according to claim 4 or 5, wherein the deep red phosphor is at least 20% and at most 55%.

According to a seventh aspect of the present invention, the blue phosphor is 0% in weight% of the phosphor in the bulb color fluorescent lamp.
6% or less, the green phosphor is 20% or more and 25% or less, the red phosphor is 30% or more and 50% or less,
The light bulb color fluorescent lamp according to claim 4 or 5, wherein the deep red phosphor is 25% or more and 50% or less.

According to the present invention, the blue phosphor is a divalent europium-activated blue phosphor having a peak wavelength of 400 nm or more and 460 nm or less, and the green phosphor has a peak wavelength.
Terbium-activated green phosphor having a wavelength of 500 nm or more and 550 nm or less,
Or a terbium / cerium activated green phosphor, the red phosphor is a trivalent europium activated red phosphor having a peak wavelength of 600 nm or more and 620 nm or less, and the deep red phosphor has a peak wavelength of 625 nm or more and 670 nm or less. The bulb color fluorescent lamp according to claim 4, which is a deep red phosphor activated with cerium / manganese.

According to a ninth aspect of the present invention, there is mainly provided a divalent europium-activated blue phosphor, terbium or terbium.
4. The light bulb color fluorescent lamp according to claim 1, comprising a cerium-activated green phosphor and a cerium / manganese-activated deep red phosphor.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an outline of a conspicuous index M will be described. The degree of conspicuousness of a color object illuminated under each lighting lamp is determined by four color test colors (red, yellow,
(Green, blue). As shown in FIG. 2, the magnitude of the color gamut area of the four test colors is determined by the brightness (B) and the colorfulness (Mr-g, My-b) of the nonlinear color perception model of Naya et al. research
And Application, Vol. 20, No. 3 "(Naya et al., Color Research and Application, 20, 3, (199
5) It is calculated based on the color system of ()). Table 1 shows the spectral radiance factor of each of the four test colors.

<Spectral radiance factor of four test colors for conspicuous evaluation>

[0026]

[Table 1]

As shown in FIG. 2, since the test color which particularly contributes to the conspicuousness is red, the area of the triangle surrounded by the red, blue, and green test colors with respect to the red test color is used. And the sum of the areas of the triangles surrounded by the red, yellow, and green test colors are combined with the above-described four-color test colors (red, yellow, green,
Blue) color gamut area. The conspicuous index M is represented by (Equation 1) based on the color gamut area of the four test colors.

[0028]

## EQU1 ## M = [G (S, 1000 (lx) / G (D65,1000
(Lx))] ^1.6 × 100 (Equation 1) G (S, 1000 (lx)) is the sample light source S
G (D65, 1000 (lx)) is the reference light source D65 and the four colors under the reference illuminance 1000 (lx). The color gamut area of the test color is shown.

That is, 4 under any illumination lamp light S
When the color gamut area of the color test color shows an area equivalent to the color gamut area under the standard light D65, that is, the standard light D6
When a conspicuous feeling equivalent to 5 lights was obtained, the conspicuous index M of the lamp was standardized as M = 100. The higher the conspicuous index M, the more conspicuous the object color, such as red of fresh flowers and green of leaves.

As described above, in the present invention,
To determine the range of the prominence index that shows the appearance of an incandescent light bulb that is almost the same as or better than the incandescent light bulb for foods, fresh flowers, and leaves that are important objects for the light source's conspicuous effect. Is the most important issue.

Therefore, several kinds of 40 W straight tube type fluorescent lamps with different conspicuous indexes M were prepared, and evaluation experiments were performed to determine the range of conspicuous indexes having substantially the same effect on the appearance of incandescent lamps. Was done.

The bulb-color fluorescent lamps used in the experiments were LaPO ₄ : Ce ³⁺ , Tb ³⁺ (shown as LAP in Table 2) for the green phosphor and Sr ₁₀ (PO ₄ ) ₆ Cl for the blue phosphor. ₂ : Eu ²⁺ (indicated by SCA in Table 2) and Y ₂ O ₃ : Eu ³⁺ (indicated by YOX in Table 2) and 3.5MgO ·
0.5MgF ₂ · GeO _2: with Mn ⁴⁺ (shown in Table 2, MFG), greenish, was produced by blue and mix the phosphors of three colors of red. For comparison with an incandescent light bulb, a 2800 K light bulb color fluorescent lamp having a correlated color temperature equivalent to the color temperature of the incandescent light bulb to be compared was produced.

The observation experiment was conducted at a depth of 170 cm and a width of 150 cm.
cm and a height of 180 cm, and the observation was carried out at an observation booth equipped with fluorescent lamps and incandescent lamps on the ceiling surface.

The wall surface is N8.5, the floor surface is N5, and the desk is N7. On the desk, foods such as tomato, lemon, tangerine, bell pepper, etc., Various colorful flowers and plants, such as roses, red, pink, white carnations, yellow chrysanthemums, blue violet, red purple statice, white Turkish bellflowers bordered in purple and pink, etc. Plasters, hand mirrors, small tatami mats, newspapers, magazines, and 15 types of color charts were placed. In the experiment, each fluorescent lamp and incandescent lamp were turned on alternately, and the appearance of the color in the observation booth was evaluated while comparing the appearance of the fluorescent lamp and the appearance of the incandescent lamp with time.

The evaluation of the incandescent light bulb is as follows. As an alternative to the incandescent light bulb, the appearance of the incandescent light bulb is almost equally beautiful and vivid as that of the incandescent light bulb. Evaluation was made based on whether or not it was too much. Table 2 shows the prototype lamps used in the evaluation experiments and their evaluation results.

[0036]

[Table 2]

Table 2 shows the prototype number (NO.) Of the prototype lamp and the type of phosphor (SCA, LAP, YO) in this order.
X, MFG) and their weight ratio, correlated color temperature, and chromaticity deviation from the blackbody locus (however, plus is the chromaticity deviation from the blackbody locus to the upper left, and minus is the lower right from the blackbody locus) Δu, v), a conspicuous index M, and an observation evaluation result. As a substitute for the incandescent lamp, the circles in Table 2 look almost equally beautiful and vivid as the incandescent lamp color appearance, and are not too vivid as the incandescent lamp color appearance. This shows the evaluation result.

As is clear from Table 2, the value of the conspicuous index M is equal to or greater than 124, which is equal to the conspicuous index M of the incandescent lamp.
At less than 50, it was found that the incandescent lamp had almost the same color characteristics as the color appearance.

Next, the color temperature (TC) of the incandescent lamp and the conspicuous index
FIG. 3 shows the relationship with (M). As is apparent from FIG.
The conspicuous index M of a 150K incandescent lamp is 121. Therefore, in order for a light bulb color fluorescent lamp having a correlated color temperature of 3150K to have a color appearance equal to or higher than that of a 3150K incandescent lamp, the conspicuous index M of the light bulb color fluorescent lamp needs to be 121 or more. The prominent index M of the incandescent lamp of 2900K is 123. Therefore, in order for a light bulb color fluorescent lamp having a correlated color temperature of 2900K to have a color appearance equal to or higher than that of a 2900K incandescent lamp, the conspicuous index M of the light bulb color fluorescent lamp needs to be 123 or more.

When the relationship between the correlated color temperature T of the light colors of these lamps and the conspicuous index M is expressed as a mathematical expression, it can be expressed by the simultaneous inequalities M ≧ 75000 / T + 97.0 and M ≦ 75000 / T + 118.5. However, the correlated color temperature of the light color of the lamp is 2700K or more and 3150K or less, and the chromaticity point of the light color has a chromaticity deviation from the blackbody locus of -0.005 or more on the CIE 1960 uv chromaticity diagram.
It exists in a chromaticity range of 0.005 or less.

Next, the relative spectral distribution of the bulb-color fluorescent lamp manufactured as one embodiment of the present invention is shown.

(First Embodiment of Fluorescent Lamp)
First, an example of a fluorescent lamp having a correlated color temperature of 3000 K and a 40 W straight tube type constituted by four phosphors will be described.

FIG. 4 shows Sr ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu ²⁺ and LaPO ₄ : Ce ³⁺ , T
Fluorescence obtained by mixing four phosphors of b ³⁺ , Y ₂ O ₃ : Eu ³⁺ and 3.5MgO · 0.5MgF ₂ · GeO ₂ : Mn ⁴⁺ in a ratio of about 2: 21: 46: 31 in weight% in order. It is a spectral distribution of a lamp. The prominent index M of the fluorescent lamp of FIG. 4 is 133, and the lamp efficiency is about 72 lm / W. The chromaticity point of the light color has a chromaticity deviation from the blackbody locus on the CIE 1960 uv chromaticity diagram of -0.0003.

The conspicuous index M of a 3000K incandescent lamp is 1
22 and the lamp efficiency is about 12 lm / W.

Therefore, the efficiency of the fluorescent lamp of FIG. 4 is about six times, and since the conspicuous index M is higher than that of an incandescent light bulb, the red color of the fresh flower is particularly smaller than the color appearance under the incandescent light. Can provide a fluorescent lamp with a light bulb color in which the greens of the leaves and the leaves of the tree can be seen vividly and neatly.

(Second embodiment of fluorescent lamp)
2 shows a second embodiment of the present invention. Generally, incandescent light bulbs
It is often used at around 2800K. The fluorescent lamp of FIG. 4 has a correlated color temperature of 3000K, and feels somewhat whitish as compared with an incandescent lamp of 2800K.
In order to replace a general incandescent light bulb, a correlated color temperature of about 2800K to about 2700K to 2900K is considered to be optimal. Therefore, an example of a fluorescent lamp composed of four phosphors and having a correlated color temperature of 2800K will be described below.

FIG. 1 shows Sr ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu ²⁺ and LaPO ₄ : Ce ³⁺ , T
Fluorescence in which four phosphors of b ³⁺ , Y ₂ O ₃ : Eu ³⁺ and 3.5MgO · 0.5MgF ₂ · GeO ₂ : Mn ⁴⁺ are mixed in a ratio of about 2: 22: 38: 38 in order by weight. It is a spectral distribution of a lamp, and is a No. 4 fluorescent lamp of (Table 2).

The prominent index M of the fluorescent lamp of FIG.
The lamp efficiency is about 66lm / W. The chromaticity point of light color is CIE
1960 uv The chromaticity deviation from the blackbody locus on the chromaticity diagram is 0.000
4. The prominent index M of an incandescent lamp of 2800K is 12
4 and the lamp efficiency is about 12 lm / W.

Therefore, the fluorescent lamp of FIG.
Since the efficiency is twice as high and the conspicuous index M is higher than the conspicuous index of the incandescent light bulb, the light bulb color fluorescent lamp in which the red of the fresh flowers and the green of the leaves are more vivid and clear than the color appearance under incandescent light. Can be provided.

(Third Embodiment of Fluorescent Lamp)
FIG. 6 shows a third embodiment of the present invention in which a cerium / manganese activated deep red phosphor is used as the deep red phosphor.

FIG. 6 shows that BaMgAl ₁₀ O ₁₇ : Eu ²⁺ and LaPO ₄ : Ce ³⁺ , T
It is a spectral distribution of a fluorescent lamp in which three phosphors of b ³⁺ and GdMgB ₅ O ₁₀ : Ce ³⁺ and Mn ²⁺ are mixed.

In FIG. 6, the conspicuous index M is 145, the color temperature is 2800 K, and the chromaticity point of the light color has a chromaticity deviation of 0 from the blackbody locus on the CIE 1960 uv chromaticity diagram.

Therefore, in the fluorescent lamp of FIG. 6, since the conspicuous index M is higher than the conspicuous index of the incandescent lamp, the red of the fresh flowers and the green of the leaves particularly look more vivid and clear than the appearance of the color under the light of the incandescent lamp. A light bulb color fluorescent lamp can be provided.

FIGS. 1, 4 and 6 show each embodiment of the present invention.
Although the embodiment has been described, various other combinations of phosphors may be used.
Needless to say, the present invention can be realized in any case. With one example
And the phosphor of 400nm to 460nm is Sr_TwoP_TwoO₇:EU²⁺, Sr_Ten
(PO_Four)₆Cl_Two:EU²⁺, (Sr, Ca)_Ten(PO_Four)₆Cl_Two:EU²⁺, (Sr, Ca)
_Ten(PO_Four)₆Cl_Two・ NB_TwoO_Three:EU²⁺And BaMg_TwoAl₁₆O₂₇:EU²⁺, 500nm
550 nm phosphor is LaPO_Four: Ce³⁺, Tb³⁺, La_TwoO_Three・ 0.2SiO
_Two・ 0.9P_TwoO5: Ce³⁺, Tb³⁺, CeMgAl₁₁O₁₉: Tb³⁺And GdMgB_FiveO_Ten: C
e³⁺, Tb³⁺, 600nm to 620nm phosphor is Y_TwoO_Three:EU ³⁺, 625
The phosphor from nm to 670 nm is Y_TwoO_Three:EU³⁺, GdMgB_FiveO_Ten: Ce³⁺, T
b³⁺, Mn²⁺And GdMgB _FiveO_Ten: Ce³⁺, Mn²⁺, Mg₆As_TwoO₁₁: Mn⁴⁺And 3.5
MgO ・ 0.5MgF_Two・ GeO_Two: Mn⁴⁺ And so on.

Further, a blue phosphor having a wavelength of 400 nm or more and 460 nm or less,
The color is almost the same as that of an incandescent light bulb even when a small phosphor with a peak wavelength is added in addition to a green phosphor of 500 nm or more and 550 nm or less, a red phosphor of 600 nm or more and 620 nm or less, and a deep red phosphor of 625 nm or more and 670 nm or less. It goes without saying that a bulb-color fluorescent lamp having characteristics can be produced.

Further, in this embodiment, the light bulb color fluorescent lamp made of a 40 W straight tube is shown. However, it goes without saying that the fluorescent lamp of the present invention can be made even if the wattage is different or the shape of the fluorescent lamp is different. No.

Note that the chromaticity point of the light color of the fluorescent lamp is
1960 uv Chromaticity deviation Δ from chromaticity point of blackbody locus on chromaticity diagram
The closer u and v are to 0, the closer to the light color of an incandescent light bulb. However,
In the case of a fluorescent lamp, since the light color of the fluorescent lamp varies in the manufacturing process, the chromaticity deviation Δu, v may be in the range of -0.005 or more and +0.005 or less, which is an acceptable range compared with 0, and the incandescence may be increased. The light color is similar to the light color of a light bulb.

The chromaticity deviation Δu, v is defined as S (u, v), the chromaticity point of the light color of the light source, and the chromaticity deviation from the chromaticity point S to a black body locus, as shown in FIG. The intersection of the perpendicular and the blackbody locus is P
When (u _o , v _o ), the chromaticity point S on the CIE 1960uv chromaticity diagram
And the distance SP from the intersection P.

However, when the chromaticity point S is on the upper left side of the locus of the black body (greenish light color side), the chromaticity deviation is positive (Δu, v>
0), the chromaticity deviation is negative (Δu, v <0) when it is on the lower right side (reddish light color side).

[0060]

As described above, according to the present invention, it is possible to realize a fluorescent lamp having a lamp efficiency higher than that of an incandescent lamp, which is almost equal to or more than a color appearance under the light of an incandescent lamp.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relative spectral distribution of an electric bulb color fluorescent lamp according to an embodiment of the present invention.

FIG. 2 is a diagram showing a conspicuous index M which is a basic concept of the present invention.

FIG. 3 is a diagram showing a conspicuous index M of an incandescent lamp.

FIG. 4 is a relative spectral distribution diagram of a light bulb color fluorescent lamp according to an embodiment of the present invention.

FIG. 5 is a diagram showing a chromaticity deviation SP.

FIG. 6 is a relative spectral distribution diagram of a light bulb color fluorescent lamp according to an embodiment of the present invention.

Claims (9)

[Claims] 1. The lamp has a conspicuous index M of 121 or more and 145 or less, and a correlated color temperature of a light color of the lamp is 2700 K or more and 3150 K or more.
The chromaticity point of the light color is a light bulb fluorescent lamp whose chromaticity deviation from the blackbody locus on the CIE 1960 uv chromaticity diagram is in the chromaticity range of -0.005 or more and +0.005 or less. 2. The lamp has a conspicuous index M of not less than 123 and not more than 145, and a correlated color temperature of light color of the lamp of not less than 2700K and not more than 2900K.
The chromaticity point of the light color is a light bulb fluorescent lamp whose chromaticity deviation from the blackbody locus on the CIE 1960 uv chromaticity diagram is in the chromaticity range of -0.005 or more and +0.005 or less. 3. The correlated color temperature of the light color of the lamp is 2700K or more and 315 or more.
0K or less, and the chromaticity point of the light color is present in a chromaticity range where the chromaticity deviation from the blackbody locus on the CIE 1960 uv chromaticity diagram is -0.005 or more and +0.005 or less. A bulb-color fluorescent lamp whose value satisfies M ≧ 75000 / T + 97.0 and M ≦ 75000 / T + 118.5. 4. A blue phosphor having a peak wavelength of 400 to 460 nm, a green phosphor having a peak wavelength of 500 to 550 nm, a red phosphor having a peak wavelength of 600 to 620 nm, and a peak wavelength of 625 nm. 4. The fluorescent lamp according to claim 1, wherein the fluorescent lamp is made of a deep red phosphor having a wavelength of 670 nm or less. 5. The blue phosphor has a peak wavelength of 400 nm or more.
A divalent europium-activated blue phosphor having a wavelength of not more than 60 nm, wherein the green phosphor is a terbium-activated green phosphor having a peak wavelength of 500 nm or more and 550 nm or less, or terbium.
A cerium-activated green phosphor, the red phosphor is a trivalent europium-activated red phosphor having a peak wavelength of 600 nm or more and 620 nm or less, and the deep red phosphor has a peak wavelength.
The light bulb color fluorescent lamp according to claim 4, which is a manganese-activated deep red phosphor having a wavelength of 625 nm or more and 670 nm or less. 6. The weight percentage of the phosphor in the bulb color fluorescent lamp.
In the above, the blue phosphor is 0% or more and 6% or less, the green phosphor is 20% or more and 25% or less, the red phosphor is 30% or more and 55% or less, and the deep red phosphor is 20%
The bulb-color fluorescent lamp according to claim 4 or 5, wherein the content is 55% or less. 7. The weight percent of the phosphor in the bulb color fluorescent lamp.
In the above, the blue phosphor is 0% or more and 6% or less, the green phosphor is 20% or more and 25% or less, the red phosphor is 30% or more and 50% or less, and the deep red phosphor is twenty five%
The bulb-color fluorescent lamp according to claim 4 or 5, which is at least 50%. 8. The blue phosphor has a peak wavelength of 400 nm or more.
A divalent europium-activated blue phosphor having a wavelength of not more than 60 nm, wherein the green phosphor is a terbium-activated green phosphor having a peak wavelength of 500 nm or more and 550 nm or less, or terbium.
A cerium-activated green phosphor, the red phosphor is a trivalent europium-activated red phosphor having a peak wavelength of 600 nm or more and 620 nm or less, and the deep red phosphor has a peak wavelength.
The fluorescent lamp according to claim 4, which is a cerium-manganese-activated deep red phosphor having a wavelength of 625 nm or more and 670 nm or less. 9. A blue phosphor mainly activated with divalent europium,
4. The light bulb color fluorescent lamp according to claim 1, comprising a terbium or terbium / cerium activated green phosphor and a cerium / manganese activated deep red phosphor.